Rose hips;

This might be a strange question, but on my walks around my area I found some rose hips still on the bush.
I was wondering how long you can process rose hip for jams and jellies, and teas?
If you founds the hips even in the mid-late winter can you still use them?

unlikely they would be of any use it would be better to leave them to the wild birds and animals who could find them the difference betwix life and death in winter.
I collect wild rose hips in autumn and freeze them and add them (thawed first) to the seed mix in fat I put out for the birds in winter. Haven't heard any complaints yet.